Recent activity by TiffaniWymar

1 answer 66 views

What is the relationship between the ligand field strength and the electronic structure of transition metal complexes, and how does this affect their magnetic properties?

answered Feb 24 in Quantum Chemistry

1 answer 75 views

What is the effect of the reaction intermediate concentration on the rate of reaction in the reaction between xylose and nitric acid?

answered Feb 22 in Chemical kinetics

1 answer 23 views

What is the effect of varying temperature on the reaction rate and reaction sustainability between two solutions of sodium thiosulphate and hydrochloric acid?

asked Feb 20 in Chemical kinetics

1 answer 80 views

How does the concentration of reactants affect the rate of reaction in the sustainability of a chemical reaction?

asked Feb 19 in Chemical kinetics

1 answer 81 views

How does the concentration of heavy metals in soil affect the growth and development of plants, and what are the potential health risks associated with consuming these contaminated plants?

answered Feb 19 in Environmental Chemistry

1 answer 83 views

How does the carbon footprint of different industries (such as transportation, electricity generation, and agriculture) affect the concentration of greenhouse gases in the atmosphere and contribute to climate change?

answered Feb 18 in Environmental Chemistry

1 answer 93 views

What are the different resonance structures for an ozone (O₃) molecule? How do these structures contribute to the stability of the molecule?

asked Feb 14 in Chemical bonding

1 answer 80 views

How can the synthesis of zeolites be optimized to maximize yield and enhance their properties for specific applications, such as catalysts or adsorbents?

asked Feb 14 in Materials Chemistry

1 answer 122 views

What is the role of metal ions in the catalytic activity of enzymes? Provide examples of metalloproteins, their metal centers, and their respective chemical reactions.

answered Feb 13 in Coordination Chemistry

1 answer 102 views

What are the pharmacological activities of the natural product curcumin and what structural features contribute to these activities?

asked Feb 12 in Medicinal Chemistry

1 answer 85 views

How can the mass transfer process be optimized in the production of a pharmaceutical drug using a specific chemical reactor design?

answered Feb 7 in Chemical engineering

1 answer 89 views

How can modifications to an existing molecule increase its efficacy and reduce its toxicity in the development of new treatments for autoimmune diseases?

answered Feb 5 in Medicinal Chemistry

1 answer 133 views

Calculate the yield of ibuprofen obtained from the given starting materials (2-methylpropylbenzene and carbon dioxide) during the synthesis process.

asked Feb 3 in Chemical synthesis

1 answer 131 views

What are some effective study techniques for managing time and reducing test anxiety when preparing for chemistry exams?

answered Jan 30 in Chemical education

1 answer 124 views

What is the concentration of iron (Fe) in a sample of river water using spectrophotometry at a wavelength of 510 nm? Given that the absorbance value of the sample at 510 nm is 0.42, and the molar absorptivity of iron (Fe) at that wavelength is 18,000 M^-1 cm^-1.

answered Jan 30 in Analytical Chemistry

1 answer 136 views

How can we use ion-selective electrodes to identify the presence and concentration of chloride ions in a given solution?

asked Jan 30 in Analytical Chemistry

1 answer 88 views

Calculate the heat of hydration for the reaction between anhydrous copper sulfate (CuSO4) and water (H2O), given that the mass of anhydrous copper sulfate used is 10 g and the temperature of the solution increases from 25°C to 35°C. The molar heat of hydration for copper sulfate pentahydrate (CuSO4.5H2O) is -90.1 kJ/mol.

answered Jan 23 in ThermoChemistry

1 answer 79 views

Calculate the corrosion rate of a copper metal when it is placed in a galvanic couple with zinc metal. The potential difference between the two metals is measured to be 1.5 V and the surface area of the copper metal is 2 cm². The density of copper is 8.96 g/cm³ and its atomic weight is 63.546 g/mol. The atomic weight of zinc is 65.38 g/mol and its density is 7.14 g/cm³. At constant temperature and pressure, assume that the Faraday constant is 96,485 Coulombs/mol and that one mole of electrons is equivalent to one Faraday.

asked Jan 23 in ElectroChemistry

1 answer 87 views

Calculate the amount of energy needed to desorb 10 moles of hydrogen gas from a metal surface, given that the enthalpy of desorption is -120 kJ/mol.

asked Jan 23 in ThermoChemistry

1 answer 94 views

A student wants to calculate the efficiency of an electrochemical cell with a standard potential of -0.74 volts. The cell is set up with a copper electrode immersed in a solution of copper(II) sulfate and a silver electrode immersed in a solution of silver nitrate, connected by a salt bridge. The student measures a current of 0.5 amperes flowing through the cell for a duration of 60 minutes. Calculate the efficiency of the electrochemical cell in terms of the amount of reactants consumed and the amount of product formed.

answered Jan 22 in ElectroChemistry

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